CSNW Sends Packets Greater Than Negotiated Maximum Packet Size (142675)
The information in this article applies to:
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0
This article was previously published under Q142675 SYMPTOMS
Client Services for NetWare (CSNW) can send frames to a NetWare server that
are bigger than the maximum allowed by the NetWare server. If the NetWare
server has network card drivers installed that cannot cope with oversized
frames, it can cause the NetWare server to Abend.
CAUSE
When CSNW establishes a session with a NetWare server, it uses the Large
Internet Packet (LIP) protocol to negotiate the maximum frame size that can
be used between the two computers. However, CSNW assumes that the size
negotiated does not include the size of the IPX protocol header (30 bytes).
Therefore, CSNW can send frames to the NetWare server that are up to 30
bytes bigger than the negotiated maximum frame size. In extreme cases, this
can result in the NetWare server Abending, or in the normal case, it will
result in a protracted renegotiation of the actual maximum frame size.
RESOLUTION
A fix has been produced that ensures that CSNW never sends frames greater
than the frame size negotiated by the LIP protocol.
STATUS
Microsoft has confirmed this to be a problem in Windows NT versions 3.51
and 4.0.
This problem was corrected in the latest Microsoft Windows NT 4.0 U.S.
Service Pack. For information on obtaining the service pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):
| Modification Type: | Major | Last Reviewed: | 8/8/2001 |
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| Keywords: | kbnetwork KB142675 |
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